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Which statement about cartilage and bone is correct?
a. An endoskeleton made of bone rather than cartilage allows animals to grow larger and heavier.
b. Cartilage is less flexible than bone, but stronger.
c. Cartilage is a hard tissue that consists of a collagen matrix, or framework, filled in with minerals such as
calcium.
d. A distinguishing feature of vertebrates is their exoskeleton made of bone or cartilage